Table 3.
Reproducibility statistics for intra-rater and inter-rater variations in measured aortic diameters and flow angles.
| Intra-Rater | |||||
|---|---|---|---|---|---|
| Mean Value (mm) | Mean Stddev (mm) | CV (%) | CCC | Bland Altman 95% confidence interval of difference (mm) | |
| AOV | 23.74 | 1.17 | 4.6% | 0.926 | [-2.59,3.91] |
| SOV | 30.32 | 0.98 | 3.2% | 0.949 | [-2.44,3.00] |
| STJ | 27.42 | 0.67 | 2.6% | 0.970 | [-2.14,1.59] |
| AA | 27.91 | 0.67 | 2.3% | 0.988 | [-1.89,1.79] |
| Mean Value (degrees) | Mean Stddev (degrees) | CV (%) | CCC | Bland Altman 95% confidence interval of difference (degrees) | |
| FLOW ANGLE | 13.7 | 1.64 | 12.0% | 0.946 | [-4.34,4.77] |
| Inter-Rater | |||||
| Mean Value (mm) | Mean Stddev (mm) | CV (%) | CCC | Bland Altman 95% confidence interval of difference (mm) | |
| AOV | 23.74 | 1.33 | 5.1% | 0.893 | [-4.94,2.45] |
| SOV | 30.32 | 1.23 | 3.9% | 0.914 | [-4.17,2.62] |
| STJ | 27.42 | 1.00 | 3.8% | 0.910 | [-3.76,1.79] |
| AA | 27.91 | 0.86 | 3.0% | 0.977 | [-1.97,2.78] |
| Mean Value (degrees) | Mean Stddev (degrees) | CV (%) | CCC | Bland Altman 95% confidence interval of difference (degrees) | |
| FLOW ANGLE | 13.7 | 1.38 | 10.2% | 0.960 | [-3.40,4.23] |
Data are based on 2 repeat measurements in all (25) subjects. The table gives the estimated standard deviation in repeat measurements based on pair-wise differences, the mean corresponding coefficient of variation, the concordance correlation coefficient{Lin, 1989 #188}, and Bland Altman confidence intervals{Bland, 1986 #246}.